Hie. Just one small highlight. Gtalk is being replaced with what Google calls 'Hangouts', which I believe will become the next best thing in instant messaging and has replaced gtalk on Android already. With the promised upgrade that incorporates SMS into Hangouts soon, we might find ourselves using it more compared to Skype, Viber, etc.
I have already tried it and its awesome and all it requires is your Google account.
The rest of the functions are there. Messages, Emoticons, Video Calling including group video chats which was called Hangout before.
Although I didn't hear talk of Nokia being supported